Maximum said:Did you try a reset (hold lock button and home button at the same time)? If so, maybe you can delete the iOS7 and reinstall it? I don't think I've ran into this problem.
blimp said:I had this problem too, but this fixed it for me: http://www.redmondpie.com/how-to-fix-imessage-not-working-in-ios-7/ Good luck!
blimp said:Glad it worked haha. iOS 7 has a lot of weird bugs but it's worth it imo.